FIELD: process engineering.
SUBSTANCE: proposed method can be used in wave or fountain soldering, or cascade soldering, or dip soldering or soldering with solder leveling by hot air knife, primarily, in producing p.c.b. Active additive liquid layer is kept up on molten solder surface, aforesaid layer containing dimmer acid to remove metal oxide from solder and absorb it. Said active additive represents organic liquid with nucleophilic and/or electrophilic groups. Molten solder is purified in situ to make soldering more efficient, particularly in using leadless solder. Removal of metal oxide cleans the bath and reduces solder viscosity to up reliability of soldered connections.
EFFECT: higher reliability of soldered connections.
22 cl, 6 dwg, 3 tbl
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